Double-peak specific heat and spin freezing in the spin-2 triangular lattice antiferromagnet
Abstract
We report the properties of a triangular lattice iron-chalcogenide antiferromagnet FeAl2Se4.The spin susceptibility reveals a significant antiferromagnetic interaction with a Curie-Weiss temperature ΘCW ≃ –200 K and a spin-2 local moment. Despite a large spin and a large |ΘCW|, the low-temperature behaviors are incompatible with conventional classical magnets. No long-range order is detected down to 0.4 K. Similar to the well-known spin-1 magnet NiGa2S4, the specific heat of FeAl2Se4 exhibits a double-peak structure and a T2 power law at low temperatures, which are attributed to the underlying quadrupolar spin correlations and the Halperin-Saslow modes, respectively. The spin freezing occurs at ~14 K, below which the relaxation dynamics is probed by the ac susceptibility. Our results are consistent with the early theory for the spin-1 system with Heisenberg and biquadratic spin interactions. We argue that the early proposal of the quadrupolar correlation and gauge glass dynamics may be well extended to FeAl2Se4. Furthermore, our results provide useful insights about the magnetic properties of frustrated quantum magnets with high spins.
- Authors:
-
- Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Sciences, Beijing (China)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Forschungszentrum Juelich GmbH, Garching (Germany)
- Helmholtz-Zentrum Dresden-Rossendorf (Germany)
- Fudan Univ., Shanghai (China)
- Fudan Univ., Shanghai (China); Nanjing Univ. (China)
- Boston College, Chestnut Hill, MA (United States)
- Fudan Univ., Shanghai (China); The Univ. of Hong Kong (China); Nanjing Univ. (China)
- Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Sciences, Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
- Publication Date:
- Research Org.:
- Boston College, Chestnut Hill, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1610431
- Alternate Identifier(s):
- OSTI ID: 1546326
- Grant/Contract Number:
- FG02-99ER45747; 51532010; 51772323; 91422303; 51472266; 2016YFA0301001; 2016YFA0300500
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 5; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; materials science; physics; frustrated magnetism; magnetic susceptibility; magnetism; antiferromagnets; crystal structure; crystal growth; specific heat measurements; susceptibility measurements; X-ray powder diffraction
Citation Formats
Li, Kunkun, Jin, Shifeng, Guo, Jiangang, Xu, Yanping, Su, Yixi, Feng, Erxi, Liu, Yu, Zhou, Shengqiang, Ying, Tianping, Li, Shiyan, Wang, Ziqiang, Chen, Gang, and Chen, Xiaolong. Double-peak specific heat and spin freezing in the spin-2 triangular lattice antiferromagnet FeAl2Se4. United States: N. p., 2019.
Web. doi:10.1103/physrevb.99.054421.
Li, Kunkun, Jin, Shifeng, Guo, Jiangang, Xu, Yanping, Su, Yixi, Feng, Erxi, Liu, Yu, Zhou, Shengqiang, Ying, Tianping, Li, Shiyan, Wang, Ziqiang, Chen, Gang, & Chen, Xiaolong. Double-peak specific heat and spin freezing in the spin-2 triangular lattice antiferromagnet FeAl2Se4. United States. https://doi.org/10.1103/physrevb.99.054421
Li, Kunkun, Jin, Shifeng, Guo, Jiangang, Xu, Yanping, Su, Yixi, Feng, Erxi, Liu, Yu, Zhou, Shengqiang, Ying, Tianping, Li, Shiyan, Wang, Ziqiang, Chen, Gang, and Chen, Xiaolong. Tue .
"Double-peak specific heat and spin freezing in the spin-2 triangular lattice antiferromagnet FeAl2Se4". United States. https://doi.org/10.1103/physrevb.99.054421. https://www.osti.gov/servlets/purl/1610431.
@article{osti_1610431,
title = {Double-peak specific heat and spin freezing in the spin-2 triangular lattice antiferromagnet FeAl2Se4},
author = {Li, Kunkun and Jin, Shifeng and Guo, Jiangang and Xu, Yanping and Su, Yixi and Feng, Erxi and Liu, Yu and Zhou, Shengqiang and Ying, Tianping and Li, Shiyan and Wang, Ziqiang and Chen, Gang and Chen, Xiaolong},
abstractNote = {We report the properties of a triangular lattice iron-chalcogenide antiferromagnet FeAl2Se4.The spin susceptibility reveals a significant antiferromagnetic interaction with a Curie-Weiss temperature ΘCW ≃ –200 K and a spin-2 local moment. Despite a large spin and a large |ΘCW|, the low-temperature behaviors are incompatible with conventional classical magnets. No long-range order is detected down to 0.4 K. Similar to the well-known spin-1 magnet NiGa2S4, the specific heat of FeAl2Se4 exhibits a double-peak structure and a T2 power law at low temperatures, which are attributed to the underlying quadrupolar spin correlations and the Halperin-Saslow modes, respectively. The spin freezing occurs at ~14 K, below which the relaxation dynamics is probed by the ac susceptibility. Our results are consistent with the early theory for the spin-1 system with Heisenberg and biquadratic spin interactions. We argue that the early proposal of the quadrupolar correlation and gauge glass dynamics may be well extended to FeAl2Se4. Furthermore, our results provide useful insights about the magnetic properties of frustrated quantum magnets with high spins.},
doi = {10.1103/physrevb.99.054421},
journal = {Physical Review B},
number = 5,
volume = 99,
place = {United States},
year = {Tue Feb 19 00:00:00 EST 2019},
month = {Tue Feb 19 00:00:00 EST 2019}
}
Web of Science
Figures / Tables:
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